Use the Following Information to Answer the Question

question 45

Multiple Choice

Use the following information to answer the question.
Rose-picker's disease is caused by the yeast Sporothrix schenkii that if introduced into the human body can assume a hyphal morphology and grow along the interiors of lymphatic vessels until they reach a lymph node.
Lymph nodes are important for the immune system because many white blood cells (phagocytes and lymphocytes) reside there.
Given that a successful infection by S. schenkii damages lymph nodes themselves, which of the following is most probable?

• A) The hyphae secrete antibiotics, which increases the ability of the infected human to tolerate the fungus.
• B) The fungal conversion from yeast to hyphal morphology allows such fast growth that the body's defenses are at least temporarily overwhelmed.
• C) Defensive cells of humans cannot detect foreign cells that are covered with cell walls composed of cellulose.
• D) Given that most fungal pathogens attack plants, human defenses are simply not adapted to seek out and destroy fungi.

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